ELNet LTE - User Manual 31.12.2013 · 3.2 — Control Buttons ... To unpack the ELNet LTE Energy &...

Installation & Operation Manual

ELNet LTE

Electrical Measurements & Energy

meter Rev. 1.8

Table of Contents CHAPTER 1 ─ INTRODUCTION .......................................5

1.1 — About the ELNet LTE Energy Powermeter .. 5

1.2 — How to use this manual ......................................... 6

1.3 — Safety Information ................................................ 8

1.4 — Warranty ................................................................ 9

1.5 — Your comments are welcome ............................... 11

1.6 — Disclaimer .............................................................12

CHAPTER 2 — INSTALLATION ...................................... 13

2.1 — Contents of packaging .........................................14

2.2 — Mechanical mounting ..........................................15

2.3 — Wiring Schematics ...............................................17

2.4 — Rear Panel Connections .......................................19

2.5 — Digital Outputs and Inputs. .................................23

2.6 — Manufacturing Data. ...........................................24

CHAPTER 3 — USING ELNet LTE

POWERMETER .............................................................25

3.1 — Front Panel ...........................................................25

3.2 — Control Buttons ....................................................26

3.3 — Lock Utility ...........................................................27

CHAPTER 4 — NECESSARY ELNet LTE SETTINGS 28

4.1 — Settings for Current/Voltage Transformer .........31

4.2 — Change language ..................................................32

4.3 — Setting energy pulse out .......................................33

4.4 — Setting no-volt ......................................................34

4.5 — Setting phase order alarm ...................................35

CHAPTER 5 — FRONT PANEL DISPLAYS ..............36

5.1 — Current Voltage & Frequency .............................36

5.2 — Reset I , V , F Peak values ..................................38

5.3 — Power Display .......................................................38

5.3.1 — Real time power display ................................ 38

5.4 — Power Quality .......................................................40

5.5 — Energy Metering ..................................................41

CHAPTER 6 — COMMUNICATION ................................ 42

6.1 — MODBUS Framing ..............................................42

6.1.1— RTU Transmission Mode ................................ 42

6.1.2 — The RTU Frame Format ................................ 43

6.1.3 — Address Field .................................................. 44

6.1.4 — Function Field ................................................ 44

6.1.5 — Data Field ....................................................... 45

6.1.6 — Check Field ..................................................... 45

6.2 — Registers for ELNet LTE Powermeter ...............46

6.2.1 — Registers addresess ....................................... 47

6.3 — Communication Connections ..............................47

6.4 — Communication Settings ......................................48

6.4.1 — Communication Address ............................... 48

6.4.2 — Baud Rate ....................................................... 48

6.4.3 — Parity............................................................... 48

6.5 — Communication Set Up ........................................49

6.5.1 — Set up Serial Communications ...................... 49

6.6 — Communication with UniArt Software ..............50

CHAPTER 7 — Specifications ........................................... 51

7.1 — Measurement & Display ......................................52

Index .................................................................................... 53

Appendix A — Installation & Configuration Check List ... 53

CHAPTER 1 ─ INTRODUCTION

1.1 — About the ELNet LTE Energy Powermeter

Large consumers of electricity e.g. factories, hotels, hospitals,

municipalities, need to know the history of their consumption and

the quality and the values of the power supply. Details such as

Voltage, Current, Power Factor, Hertz, Neutral Current, Energy

consumption can be displayed by the ELNet LTE Energy &

Powermeter.

An additional feature of the Powermeter is the ability to measure

THD – Total Harmonics Distortion. Part of the Electricity Supply

Authority’s bill reflects poor or good Harmonics in the consumer’s

system, therefore it is in his interest to monitor Harmonics and try

to improve it.

The ELNet LTE Energy & Powermeter is a compact,

multi functional, three-phase Powermeter simple to install and is

especially designed to integrate into Building Management

Systems. It requires no special mounting and is ideally suited for

mounting on the front face of any standard electrical panel.

The Configuration and Setup is menu driven, with password

protection.

Communication with external devices is simple and is based on

standard known protocol.

Each ELNet LTE Energy & Powermeter is carefully and

meticulously manufactured using quality components and the

latest production methods. Before leaving the factory each

ELNet LTE Energy & Powermeter is calibrated and is

sent to the customer accompanied by the test certificate and

Certificate of Compliance (C.O.C).

1.2 — How to use this manual

We at CONTROL APPLICATIONS Ltd, envisage this manual to

be used by three types of people, i.e. the Installation Technician,

the Senior Electrical Engineer and the end User. For this reason

this manual is divided into chapters for ease of reference by each

of these different people. There could be a situation where two of

the above mentioned tasks can be combined, or in a rare instance

one person could handle all three tasks.

CHAPTER 1, Introduction, describes the ELNet LTE

Energy & Powermeter, its potential users, the readings it can

provide and some of its features in brief.

CHAPTER 2, Installation, provides detailed instructions for

unpacking, mechanical mounting, and electrical wiring up

instructions for the Installation Technician.

CHAPTER 3, Using the ELNet LTE Energy &

Powermeter, describes in detail front Panel, the functions of the

control buttons, and the Lock Utility.

CHAPTER 4, Parameter Configuration & Settings explains in

detail the minimum parameters settings needed by the Senior

Electrical Engineer to set up and configure the ELNet LTE

Energy & Powermeter.

CHAPTER 5, Front Panel Displays, is an easy to follow step-by-

step guide to obtain readings, graphs and tables.

CHAPTER 6, Communications provides details about the

Communication capabilities of the ELNet LTE Energy & Powermeter, and how to Set Up.

CHAPTER 7, Specifications, is a detailed list of specifications of

the ELNet LTE Energy & Powermeter.

APPENDIX A, Installation & Configuration Check List, provides

a Check List to insure no important steps will be missed during

the initial set up.

1.3 — Safety Information

The purpose of this manual is to help you. Please read the

instructions carefully before performing any installation and note

any precautions.

• Ensure that all incoming AC power and other

power sources are turned off before

performing any work on the ELNet LTE

Energy & Power Powermeter. Failure to

do so may result in serious or even fatal injury

and/or equipment damage.

• If the ELNet LTE Energy &

Powermeter is damaged in any way do NOT

connect it to any power source.

• To prevent a potential fire or shock hazard,

never expose the ELNet LTE Energy &

Powermeter to rain or moisture.

• Keep the surrounding area free of dirt and

clutter especially metal objects. Good

housekeeping pays.

• Inspect the cables periodically for cracks,

kinks or any other signs of wear.

• Keep children away.

• Do not pull the cords.

WARNING!

• Users should stay alert and not approach the

rear of the ELNet LTE Energy &

Powermeter while tired or under the

influence of alcohol, medicines or any other

chemical substance that would tend to make a

person drowsy.

• Above all use common sense at all times.

1.4 — Warranty

CONTROL APPLICATIONS Ltd provides a 12- Month warranty

against faulty workmanship or components from date of dispatch

under the condition that the product was properly installed and

used.

CONTROL APPLICATIONS Ltd does not accept liability for any

damage that may be caused by natural disasters (such as floods,

fire, earthquake, lightening etc.).

CONTROL APPLICATIONS Ltd does not accept liability for any

damage that may be caused by malfunction of the ELNet LTE Energy & Powermeter.

CONTROL APPLICATIONS Ltd will advise the customer on the

proper installation and use of the ELNet LTE Energy &

Powermeter, but will not accept any responsibility that the

instrument is suitable for the application for which it was

originally purchased.

This warranty may become void if the Installation, Parameter

Configuration & Setting Instructions are not carried out according

to the instructions set out by CONTROL APPLICATIONS Ltd.

The ELNet LTE Energy & Powermeter has no user serviceable

parts and should be opened and serviced by a duly qualified

authorized representative only. The sensitive electronics could

become damaged if exposed to a static environment. This action

would void the warranty.

This warranty is limited to the repair and/or replacement at

CONTROL APPLICATION Ltd sole discretion of the defective

product during the warranty period. Repaired or replaced products

are warranted for ninety (90) days from the date of repair or

replacement, or for the remainder of the original product’s

warranty period, whichever is longer.

CONTROL APPLICATIONS Ltd is always at your service to

advise the customer on any problem that may be encountered

regarding any installation, operation, parameter & configuration

settings or maintenance.

1.5 — Your comments are welcome

CONTROL APPLICATIONS Ltd. sincerely thanks you for

choosing our ELNet LTE Energy & Powermeter. We are

confident that it will provide you with many years of trouble free

service and give you all the power and energy information and

history that you expected from the instrument when you bought it.

While every effort was made to keep the information as reliable,

helpful, accurate and up to date as possible, all possible

contingencies cannot be covered. Technical or typographical

errors could occur, and we would be happy to receive any

comments, criticisms or notifications of any such errors from you,

our valued customer.

Address: FENIKS PRO d.o.o.

Zagrebška cesta 90

2000 Maribor

Slovenia

EUROPE

Tel: 02 460 22 58

Fax: 02 460 22 56

Electronic Address: [email protected]

1.6 — Disclaimer

Information in this User Manual is subject to change without

notice and does not represent a commitment on the part of

CONTROL APPLICATIONS Ltd.

CONTROL APPLICATIONS Ltd supplies this User Manual as is

without warranty of any kind; either expressed or implied, and

reserves the right to make improvements and/or changes in the

manual or the product at any time.

While it is the intention of CONTROL APPLICATIONS Ltd to

supply the customer with accurate and reliable information in this

User Manual, CONTROL APPLICATIONS Ltd assumes no

responsibility for its use, or for any infringement of rights of the

fourth parties which may result from its use.

This User Manual could contain technical or typographical errors

and changes are periodically made to the information herein; these

changes may be incorporated in new editions of the publication.

CHAPTER 2 — INSTALLATION

In this Chapter you will find the information and instructions that

the Installation Technician needs to mount and connect the

ELNet LTE Energy & Power Powermeter

• During operation, hazardous voltages are

present in connecting cables and terminal

blocks.

• Fully qualified personnel must do all work.

Failure to follow this rule may result in

serious or even fatal injury to personnel and/or

damage to equipment.

• Refer to Section 1.3 Safety information before

carrying out any installation.

• Read this manual thoroughly and make sure

you understand the contents before connecting

the ELNet LTE Energy & Powermeter to

any power source.

WARNING!

2.1 — Contents of packaging

To unpack the ELNet LTE Energy & Power Powermeter

The ELNet LTE Energy & Powermeter is packed and

shipped in a carton approximately 11 cm long X 11 cm wide X

10.5 and cm high.

Before opening the package, ensure the area, clean and dry.

Without using any sharp instruments, carefully open the carton of

the ELNet LTE Energy & Powermeter.

Please check the contents of the carton, it should contain:

1. New ELNet LTE Energy & Powermeter.

2. ELNet LTE User Manual (This book).

3. Test Certificate and Certificate of Compliance (C.O.C).

4. 2 X two pole connector plug.

5. 1 X six pole connector plug.

2.2 — Mechanical mounting

To Mount the ELNet LTE Energy & Powermeter

1. Choose a suitable location, and prepare a rectangular

hole according to the dimensions shown in Figure

2.1

Figure 2.1 Panel Cutout

Do not mount the ELNet LTE Energy &

Powermeter too close to any main electrical

conductors

Allow sufficient space to carry out

maintenance to the back of the ELNet

LTE Energy & Powermeter

NOTE!!

Width

90 mm

Height

90 mm

2. Slide the ELNet LTE Energy &

Powermeter into the pre-prepared rectangular

hole (ensure it is the right way up), then push

the four mounting clips into position. Use

mild force to ensure the clips are securely

positioned on the outer case of the ELNet

LTE Energy & Powermeter.

3. Ensure the ELNet LTE Energy &

Powermeter is firmly in place.

Figure 2.2 Mounting Clips

2.3 — Wiring Schematics

To wire up the ELNet LTE Energy & Powermeter

Figure 2.3 Schematic Wiring Diagram "Star" connection

New model LTE 2013 Energy & Powermeter

Figure 2.4 Schematic Wiring Diagram "Star" connection

2.4 — Rear Panel Connections

Please re-read section 1.3 for safety instructions.

To connect the Rear Panel

All Connections of the ELNet LTE Energy & Powermeter are

made via terminal connector plugs (Voltage input, Current input,

Power Supply, Communication etc.).

Maximum recommended tightening torque for the connector

screws is 0.5 Nm.

The current plugs must to connect in the correct direction.

NOTE!

Ensure all the connections to the leads of the current measurement

inputs are secure and there is no mechanical strain on the wire.

The cross section of the leads to the current transformer must be

compatible to the power of the current transformer. We

recommend a power transformer with at least 3VA and the length

of the wiring of the transformer no longer than 3m.

Insert the leads from side “L” of the external Current

Transformers to the ELNET current plug in side “L” and from side

“K” of the ELNET current plug back to side “K” of the external

transformers.

WARNING!

WARNING Never allow an open circuit between the two Current

Transformer leads.

Repeat the procedure for Line 2 and Line 3.

Connect the rest of the connections to the ELNet LTE Energy & Powermeter by means of terminal connector plugs.

The Rear Panel (See Figure 2.5) has all connections printed and is

simple to follow. (See table 2.1 for connections)

Figure 2.5 LTE Rear Panel

Figure 2.5 LTE 2013 Rear Panel

Pin

Designation

Description Remarks

V1 Line1 Supplied Voltage Through a 6Amp fuse



N Neutral Measurement neutral Line

I1A From Current

Transformer on Line1

Note the correct direction (L

and K)

I2A From Current



and K)

I3A From Current



and K)

~ Power Supply 110 - 260

VAC

Or 110-260 VDC, external

power supply or bridged from

phase measurement

Np Neutral Neutral of external power

supply

RS485 - RS485 Comm. (-) Line

RS485 + RS485 Comm. (+) Line

Digital Out Max. Load 150 mA

Table 2.1 Rear Panel connections

2.5 — Digital Outputs and Inputs.

ELNet LTE Energy & Powermeter has as default 1 Digital Output

connection at its back side.

Digital Output:

The Digital Output of the LTE can be used to transmit pulses of energy to

external BMS controller (chapter 4.3), close contact upon No Volt alarm

situation (chapter 4.4) or to close contact upon wrong Phase Order (chapter

4.5) which can be defined in the LTE (cannot be used for both

simultaneously). The Digital Out closes contact between pin ~ (power supply

input) and pin 1, the maximum load is 150mA.

Figure 2.6 LTE Digital Out wiring example

Figure 2.7 LTE 2013 Digital Out wiring example

2.6 — Manufacturing Data.

Press F1 on the keyboard for 6 seconds. The following screen will appear.

Figure 2.8 Manufacturing data

Number Screen Description

1 Ep. Date Production date of software operating system

2 Version Bios Revision

3 CT Rate Current transformer ratio

4 Comm # Communication address of RS485 Modbus

Table 2.2 Production Data

CHAPTER 3 — USING ELNet LTE POWERMETER

In this chapter you will find descriptions and functions of the front

panel and the control buttons and how to use them.

3.1 — Front Panel

To operate the front panel

The Front Panel has a graphic screen and 6 operating buttons.

All the readings are shown on a state of the art 320 X 240

resolution graphic screen and are explained in detail in Chapter 5.

The Control Buttons and their functions are fully explained in

Section 3.2.

Figure 3.1 Front Panel

3.2 — Control Buttons

To operate the Control Buttons on Front Panel

The ELNet LTE Energy & Powermeter has six Control

Buttons. With these buttons the User and Senior Electrical Engineer

can achieve all the functions necessary.

The Control Buttons are arranged on a keypad below the display

screen and require slight finger pressure to click.

Button “ENTER” accepts the choice and executes the commands.

Buttons “F1”, “F2”, “F3”, “F4” performs the function that the

arrow above is pointing to (e.g. move the cursor), or selects the

prompt that the arrow is pointing to.

Button BACK returns to the previous step or to the Main Menu.

3.3 — Lock Utility

To lock and unlock the Control Buttons

The Control Buttons can be locked against any unauthorized or

accidental usage.

NOTE!

Only sub menus can be locked. The Lock Utility does not work

on the Main Menu

To lock press “ENTER” for six (6) seconds.

A “Keyboard Locked!” message appears on the screen when any

button is pressed.

To unlock press on any button an insert password menu will

appear, the screen unlock password is 99.

In the event of a general power failure, the ELNet LTE

Energy & Powermeter will return to the screen that was

showing before the power failure occurred.

CHAPTER 4 — NECESSARY ELNet LTE SETTINGS

In this chapter you will find instructions to set the minimum

settings that are necessary to allow the ELNet LTE Energy &

Powermeter to function properly.

• The selection, installation and settings of the

Current Transformer are the most vital and

fundamental actions required to ensure the

accuracy of the ELNet LTE Energy

Powermeter.

• It is essential to know the ratio of the Current

Transformer being installed into the system in

order to set the parameter for the Current

Transformer correctly.

• All three main current Lines MUST have

Current Transformers of the same ratio

installed onto them.

WARNING!

4.0 — Entering code

The most important setting necessary for the proper

functioning of the ELNet LTE Energy &

Powermeter is the Current Transformer setting.

The cross section of the leads to the current Transformer

must be compatible to the power of the current

transformer. We recommend a power transformer with at

least 3VA and the length of the wiring of the transformer

no longer than 3m.

1 From Main Menu scroll to Technical Menu.

2 Click “ENTER”.

The Enter Code screen appears

Figure 4.1 Enter Password

The password is 1.

3 Use the buttons F3 & F4 to move the cursor, to set the value

use buttons F1 &F2.


If the incorrect password is inserted into the Password

field, an Error message appears and the password

should be reentered

The Technical Menu screen appears

Figure 4.2 Technical Menu

Use the buttons F3 & F4 to move the cursor, selecting "NEXT"

will lead you to more functions that can be set by the

technician.

4.1 — Settings for Current/Voltage Transformer

To set or change settings for Current/Voltage Transformer

See Section 4.0 for instructions to access the Technical Menu

1 Scroll to Transformers ratio and select current or voltage

transformer ratio to be set.


The Current / Voltage Transformer screen appears

Figure 4.3 Current Transformer

The present setting for the Current Transformer is shown.

Use the buttons F3 & F4 to move the cursor, to set the ratio use

buttons F1 &F2.

The method for setting for the Voltage Transformer is the

same.

4.2 — Change language

To change language on the display screen

1. From the Main menu screen click and hold the “F2”

button for 6 second.

The Set Language screen appears

Figure 4.6 Set Language

2. To select the relevant language use buttons “F3” &

“F4”, to set the language click on “Enter”.

4.3 — Setting energy pulse out

The digital output (chapter 2.5) can be used as a pulse output, each pulse

equivalent to pre defined energy consumption value, in order to set the

pulse output - see section 4.0 for instructions to access the

Technical Menu.

From Technical Menu:

1 Scroll to SET ENERGY PULSE


3 The SET ENERGY PULSE screen appears:

Figure 4.10 Set Energy Pulse

3 In order to set the KWH per pulse value, scroll to

KWH Per One Pulse and click "ENTER".

4 In order to define how long (seconds) the pulse is,

scroll to Pulse Time and click "ENTER".

5 Please note that while you are using the output for

energy pulse usage you cannot use the same output

for alarms.

4.4 — Setting no-volt

The digital output (chapter 2.5) can be used as a No-Volt alarm output,

in case that the voltage value on one of the phases drops below the

specified value the output contact will be open.

See Section 4.1 for instructions to access the Technical Menu.


1 Scroll to Min Voltage (D.Out).


3 The Min Voltage (D.Out) screen appears:

Figure 4.11 Set Min Voltage

4 The present setting for the Min Voltage is shown.

Use the buttons F3 & F4 to move the cursor, to set

the ratio use buttons F1 &F2.


4.5 — Setting phase order alarm

The digital output (chapter 2.5) can be used as a phase order alarm

contact, in case that the phases order is incorrect the output will close

the contact.



1 Scroll to Check Phase Order.


3 The Check Phase Order screen appears:

Figure 4.12 Check Phase Order

4 Use the buttons F3 & F4 to move the cursor, to set

the value to1 (active) with buttons F1 &F2.


CHAPTER 5 — FRONT PANEL DISPLAYS

In this chapter you will find instructions on how to obtain the

readings that the ELNet LTE Energy & Powermeter provides,

e.g., Current, Voltage Power, Power Factor, Energy, and Power

quality.

5.1 — Current Voltage & Frequency

To display Current Voltage and Frequency for all 3 Phases

1 From Main Menu scroll to Voltage, Current, Hz.

Figure 5.1 Main Menu


The Current Voltage and Frequency screen appears

Figure 5.2 Voltage, Current, Hz

3 Scroll to REAL TIME DISPLAY and click “ENTER”

The Current Voltage and Frequency screen appears

Figure 5.3 Voltage screen

4 Use “F1” in order to display voltage values.

5 Use “F2” in order to display current values.

6 Use “F3” in order to display Current and Voltage

table view.

7 Use “F4” in order to display Frequency values.

5.2 — Reset I , V , F Peak values

In order to clear old peak values

1 From Main Menu scroll to Voltage, Current, Hz.

2 Click “ENTER” The Current Voltage and Frequency screen

appears.

3 Scroll to MIN/MAX RESET and click “ENTER”.

The Enter Code screen appears

Figure 5.4 Enter reset code

In order to clear old peak values enter password 6474.

Use the buttons F3 & F4 to move the cursor, to set the value

use buttons F1 &F2.

5.3 — Power Display

5.3.1 — Real time power display

To display Power for all 3 phases

1 From Main Menu scroll to Power, power factor display.

2 The real time Power, Power factor screen appears

Figure 5.5 Power factor

4 Use “F1” in order to display Reactive Power values.

5 Use “F2” in order to display Power values table view.

6 Use “F3” in order to display Power Factor values.

7 Use “F4” in order to display total 3 lines active reactive and

apparent power values.

Parameter Description

Unit

P Active Power for each Line Watts

Q Reactive Power for each Line VAR

S Apparent Power for each Line VA

Σ P Total Active Power for all 3 Lines Watts

Σ Q Total Reactive Power for all 3 Lines VAR

Σ S Total Apparent Power for all 3 Lines VA

PF Power Factor

Table 5.1 Power Readings

5.4 — Power Quality

The ELNet LTE Energy & Powermeter is capable of

displaying the Total Harmonic Distortion of Voltage and Current

as well as the Current Real time demand.

1 From Main Menu scroll to Power Quality.


The Current THD screen appears

Figure 5.6 Current THD

3 Use “F1” in order to display Voltage THD values.

4 Use “F2” in order to display Current Real time demand

values.

5.5 — Energy Metering

To display Active, Reactive or Apparent Energy values

1 From Main Menu scroll to ENERGY METER.


The Total Energy meter screen appears

Figure 5.7 Total Energy

This meter will display the total energy that was measured and

accumulated in the meter from the moment the meter was

connected to the power. This meter is non erasable and the total

energy that was measured and accumulated cannot be changed or

deleted.

By using “F1” The ELNet will display the amount of the energy

used for each line:

L1 = Line number 1

L2 = Line number 2

L3 = Line number 3

ALL= All Lines

CHAPTER 6 — COMMUNICATION

MODBUS Protocol

The ELNet LTE Energy & Powermeter has a serial interface

port allowing direct interface with an external communication

network supporting the MODBUS Protocol.

MODBUS is an Industry Standard, widely known and commonly used

communications protocol. Using MODBUS provides communication

between a PC and up to 247 Powermeter slaves on a common line -

the PC being the master and the powermeters the slaves. The PC

initiates the transaction (either a query or broadcast) and the

Powermeter/s responds. Powermeters respond to the master PC’s

request, but will not initiate any transmission on its own. The PC sends

a single Query transaction and the Powermeter responds in a single

response frame and is capable of only one query and one response at a

time.

6.1 — MODBUS Framing

6.1.1— RTU Transmission Mode

MODBUS uses the standard Remote Terminal Unit (RTU)

transmission mode. RTU mode sends data in 8-bit binary EVEN

parity or 8-bit binary NO parity data format. For the ELNet LTE Energy & Powermeter to successfully communicate, choose one in

the communication Set Up.

Table 6.1 RTU Data Format

6.1.2 — The RTU Frame Format

Query and response information is sent in frames. Each frame

contains:

Address

Function (See Section 6.1.4 for descriptions of functions),

Data

Check

Address Function Data Check

8 bits 8 bits N * 8 bits 16 bits

Table 6.2 R T U Message Frame Format

If the receiving device (Powermeter) detects a time laps of five

characters, then it will assume the message is incomplete and will

flush the frame. The device then assumes that the next byte received

will be an address. The maximum query and response message length

is 256 bytes includuing check characters.

Field No. of bits

Start bit 1

Data bits 8

Parity 1

Stop it 1

6.1.3 — Address Field

Each Powermeter is designated in a network system by a user

assigned address. The Address can be any number between 1 and

247. The Powermeter will only respond to its own specifically

assigned address.

6.1.4 — Function Field

The function field contains the code that tells the Powermeter what

action to perform.

The ELNet LTE Energy & Powermeter uses and responds to four

standard Message Format Functions.

Function 03

Function 04

Function 06

Function 16

Function Meaning in MODBUS Action

Function 03 Read holding register Obtain data from Powermeter

(Read register)

Function 04 Read input register Obtain data from Powermeter

(Read register)

Function 06 Preset single register Transmit data to Powermeter

(Write single register)

Function 16 Preset multiple register Transmit data to Powermeter

(Write multiple register)

Table 6.3 Function Codes

6.1.5 — Data Field

The Data field contains the body of the message and contains

instructions from the PC master to the Powermeter slave to perform

a particular action or respond to a query. The reply message from the

Powermeter will be information contained in one or more of its

registers.

6.1.6 — Check Field

The error check field contains the result of Cyclical Redundancy

Check (CRC). The start of the message is ignored in calculating the

CRC.

For more detailed information on CRC, refer to the MODBUS

Protocol Reference Guide.

6.2 — Registers for ELNet LTE Powermeter

The ELNet LTE Energy & Powermeter is capable of

supporting either Function 03 or Function 04 Message Format (see

Table 6-3). In a reply to a query from the PC master for a reading

from a particular field, the response from the Powermeter can be

either in Format 03 or Format 04 but will depend on which Format

the query was originally sent.

The difference is significant because by using Function 03 the

ELNet LTE will only send the INTERGER part of the field value

requested and the PC master will only display the INTERGER part

of the field value.

Function 04, on the other hand, is capable of sending two separate

halves of the full FLOAT requested information (each half

contained in a separate register). Then it is the task of the PC

master to merge the two halves into a full FLOAT reply (For more

detailed information See IEEE Standard 754 Floating-Point).

E.G. 1 If the user’s PC master supports Function 03, then the reply

will contain the INTERGER part of the field only.

The PC master requests the Voltage from Line1, and the

actual Voltage in that field is 230.5 Volts.

Function 03 will respond with the INTERGER only i.e.

230V.

E.G. 2 If the user PC master supports Function 04, then the reply

will contain the information stored in the two registers

asssigned to that field and will contain the full, accurate reply.

The PC master requests the Voltage from Line1, and the actual

Voltage in that field is 230.5 Volts.

Function 04 will respond with a composite reply of both

register 1 and 2 giving the full FLOAT value (in IEEE Format)

from that field i.e. 230.5V.

6.2.1 — Registers addresess

The ELNet LTE MODBUS registers addresses are updated all

the time and can be downloaded from the following web site:

http://www.ddc.co.il/ELNet-pdf/ELNet_comm.pdf

The MODBUS registers addresses numbering order specify at the

above mentioned web address set as a defaults but can be changed

in order to be fit to the SCADA/HMI drivers.

6.3 — Communication Connections

The ELNet LTE Energy & Powermeter supports RS485

communication. Connections are provided on the Rear panel,

(Please refer to section 2.3) and are made by means of the

connectors provided.

6.4 — Communication Settings

To enable the User to connect the ELNet LTE Energy & Powermeter to a PC computer for successful communications, the

Communication Setup parameters of both must match; i.e. the port

of the PC and the configuration settings of the Power meter.

Address Baud Rate Parity

6.4.1 — Communication Address

Each Power meter in a communication system must have its own

unique address.

Because the ELNet LTE Energy & Powermeter works on

MODBUS, the available addresses are - from ‘1’ to ‘247’

6.4.2 — Baud Rate

The Baud Rate is the communication speed in Bits per second

(BPS) that the ELNet LTE Energy & Powermeter communicates with the PC. The better the communication line

Quality, the faster the communications may be.

If the communication line is routed through a “noisy”

environment, it may be necessary to decrease the Baud Rate.

Available Baud Rates for the ELNet LTE Powermeter:

300 bps 9600 bps

600 bps 19200 bps

1200 bps 38400 bps

2400 bps 57600 bps

4800 bps 115200 bps

6.4.3 — Parity

The choices of parity are either NONE or EVEN (see Section

6.1.1 for description of Parity)

6.5 — Communication Set Up

6.5.1 — Set up Serial Communications


1 From Technical Menu scroll to Set Communication.


3 Scroll to "Serial Comm." and click "Enter".

The Serial Communication Setup screen appears

Figure 6.2 Serial Communication Setup

Use buttons F1 &F2, to set the values

Use the buttons F3 & F4 to move the cursor

NOTE!

When the selection is made it takes immediate affect

with no further action required.

6.6 — Communication with UniArt Software

CONTROL APPLICATIONS Ltd propriety software, “UniArt” is

used to Read and Write Registers of the ELNet LTE Energy Powermeter. Each Item number in the Registers Table is a unique

field containing information. The UniArt software manages each

Item number as a parameter.

Refer to the UniArt manual how to set up parameters.

To read fields using UniArt

1 Find the reading required in the MODBUS Registers

Table

2 Note the Item Number from the Registers Table

3 Go to the correct File number

Since File capacity in UniArt is limited to 128 parameters,

the information contained in the ELNet LTE fields is

stored in several files.

File number is determined by the Item number

File # 0 contains Item number 1 - 128

File # 1 contains Item number 129 – 256



CHAPTER 7 — Specifications

Table 7.1 Specifications

All technical specifications are subject to change without notice.

Item

Description

Power requirements 90 - 250 VAC (optional)

110 - 280 VDC (optional)

60/50 Hz

9 VA

Dimensions (HxWxD) 960x960x80 mm

Shipping Weight 500 gr.

Measuring current limits 6 A

Operating Voltage limits 1000 V

Operating Current limits 50 A

Enclosure material ABS + Anti flame

Display Graphic 320x240 color screen

Operating temperature -20 - + 70 C

Storage temperature -20 - + 80 C

Humidity 0- 90 RH%

Voltage input terminals VL – E10 1708

Communication port RS485

Mounting Front Panel Mounting

7.1 — Measurement & Display

Measurement & Display (scaling factor 1)

Measurement

Parameter

Display Range

in direct

connection

(scaling factor 1)

Measuring in

direct

connection

(scaling factor 1)

Display Range

Current 0.001 – 6A 0.001 – 6A 0.001 – 99999KA

Neutral Current

(calculated )

0.001 – 6A 0.001 – 6A 0.001 – 99999KA

Voltage L-N 0.000 – 550 V 0.000 – 550 V 0.001 – 99999KV

Voltage L-L

(calculated )

0.000 – 950 V 0.000 – 950 V 0.001 – 99999KV

Frequency (Hz) 45.001-65.001 Hz 45.001-65.001 Hz 45.001-65.001 Hz

Active power

total\phase

0.000W – 99999MW

Reactive power

total\phase 0.000VAR -

99999MVAR

Apparent power

total\phase 0.000VA -

99999MVA

Power Factor

(cap.\ind.) -1.000 ÷ 1.000 -1.000 ÷ 1.000 -1.000 ÷ 1.000

Active Energy

total\phase 0.001WH –

99999999MWH

Reactive Energy

total\phase 0.001VARH -

99999999MVARH

Apparent

Energy

total\phase

0.001VAH -

99999999MVAH

Harmonic THD

V\I

0.000 – 100%

Table 7.2 Measurement & Display

Index

Appendix A — Installation & Configuration Check List

INSTALLATION CHECK LIST

Description

Date Signature

Check contents of packaging

Remove from packaging

Prepare hole

Mount Powermeter

Connect Powermeter power supply

Connect 3 Current Transformers

Connect 3 Voltage lines

Connect Neutral line

Set Current Transformer Ratio

Connect Communication lines

Check Phase Order Connections

Appendix A Table - Installation & Configuration Check List

ELNet LTE - User Manual 31.12.2013 · 3.2 — Control Buttons ... To unpack the ELNet LTE Energy &...

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